You guys can just rework on Bowser if you plan on giving a boss battle to a sequel to Pipe Towers Zone which takes place on Bowser's Castle. I know, onne has been made for an OLDC, but i don't remember it's name. On the plus side, the "Nipples the Enchilada" thingie was made by Tyson Hesse, years before he work on the artstyle of Sonic Mega Drive, the Sonic Mania CD-like cutscenes and IDW's Sonic comics. And you guys probably wouldn't believe it unless someone here already knows.